Icahn to Yahoo: Nix the poison pill, now — Editor's note: Updated on June 4, Wednesday, at 3:06 p.m. PDT with comments from Carl Icahn during an interview on CNBC. — Billionaire investor Carl Icahn, who is waging a proxy fight with Yahoo, sent a letter to Yahoo Chairman Roy Bostock on Wednesday.

Firefox 3 (Release Candidate 2) Release Notes — This second Firefox 3 Release Candidate is a preview release of Mozilla's next generation Firefox browser and is being made available for testing purposes only. — Preview releases are published to collect feedback from Web developers …

Mozilla Firefox 3.0 Is the Best Browser For Web — For Now — If you buy a new Windows Vista PC, it comes with a decent built-in Web browser, Internet Explorer 7. If you buy a new Macintosh computer, it comes with a decent built-in Web browser, Safari 3.0. So why would you want or need a different Web browser?

How to Get and Keep Windows XP After June 30 — Microsoft may be sunsetting XP, but you'll still be able to buy it on some new systems—and support isn't going away for several years. — Windows XP is dead ... long live Windows XP. You may have heard that as of June 30 …

Mac OS X 10.6 code named Snow Leopard, may be pure Cocoa — The next version of Mac OS X is code-named “Snow Leopard,” and will indeed be Intel-only, we have learned. This info is hot on the heels of TUAW's original scoop about Mac OS X 10.6 being readied for shipment as soon as Macworld 2009 and being Intel-only.

What Newspapers Still Don't Understand About The Web — Why is Google making more money everyday while newspapers are making less? I'm going to pick on The Washington Post again only because it's my local paper and this is a local example. — There were severe storms in the Washington area today …

Study secretly tracks cell phone users outside US — WASHINGTON - Researchers secretly tracked the locations of 100,000 people outside the United States through their cell phone use and concluded that most people rarely stray more than a few miles from home.

Boffins prove the existence of jet-setters — You can believe them. They secretly tracked 100,000 cell phone users — According to researchers at Northeastern University in Boston, Massachusetts, most people rarely venture more than a few miles from home. And these researchers know what they're talking about.

Verizon in Talks to Buy Alltel for $27 Billion — Verizon is deep in talks to acquire Alltel, the nation's fifth largest wireless carrier, for roughly $27 billion, people close to the talks have told CNBC. — Alltel was only recently taken private by TPG and Goldman Sachs Capital Partners in a $27.5 billion deal.

Introducing A New TechCrunch Video Project: Elevator Pitches — We get a ton of pitches at TechCrunch every single day. It is a deluge we can hardly keep up with. Some are amusing, some are horrible, and a select few rise to the level of deserving a post. The large majority, though, never see the light of day.

Facebook quietly launches advertising feedback — The Facebook advertising platform continues to advance ahead of the rest of the social network pack. We're still waiting on the API, but they've recently snuck out a feature that allows users to indicate whether they like or dislike an ad served up to them.

Acer bets big on Linux — Vendor shifts towards open source ‘because of Microsoft’ … Acer has stated that it will be pushing Linux aggressively on its laptops and netbooks. — The company is already heavily promoting Linux for its low cost ultra-portable netbook range out later this year …

Text to Save Lives: Mobile Giving Takes Off — Last month, both China and Myanmar suffered natural disasters of such huge proportions that they received the attention of the world. The combination of the quake and the cyclone left a death toll that is today approaching 200,000, but has affected millions more.